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Yakvenalex [24]
4 years ago
7

A group of birds eat fruit from a tree. The fruit falls to the ground where

Chemistry
1 answer:
olchik [2.2K]4 years ago
3 0

Answer:

Both answer choice 2 and answer choice 3 are correct choices.

Explanation:

Biotic factors are living components in an ecosystem. They are living organisms which affect another living component in an ecosystem.

Antibiotic factors are non living components of an ecosystem. They are chemicals which affect living organisms.

The choice 2 is correct. The seeds spread out by mice is a biotic factor interacting with an antibiotic factor

Choice 3 is correct. The seeds in the soil grow into new trees are biotic factors interacting with an antibiotic factor

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3 years ago
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If 27.9 grams of calcium carbonate reacts with excess HCl, how many moles of calcium chloride are produced
Virty [35]

Answer:

\large \boxed{\text{0.2797 mol}}

Explanation:

We must do the conversions:

mass of CaCO₃ ⟶ moles of CaCO₃ ⟶ moles of CaCl₂

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ:     100.09                  110.98

         CaCO₃ + 2HCl ⟶ CaCl₂ + CO₂ + 2HCl

m/g:     27.9

(a) Moles of CaCO₃\text{Moles of CaCO}_{3} = \text{27.9 g CaCO}_{3}\times \dfrac{\text{1 mol CaCO}_{3}}{\text{100.09 g CaCO}_{3}}= \text{0.2787 mol CaCO}_{3}

(b) Moles of CaCl₂\text{Moles of CaCl}_{2} =\text{0.2787 mol CaCO}_{3} \times \dfrac{\text{1mol CaCl}_{2}}{\text{1 mol CaCO}_{3}} = \text{0.279 mol CaCl}_{2}\text{The reaction produces $\large \boxed{\textbf{0.279 mol}}$ of CaCl}_{2}

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